msem-instigator

As an additional cost to cast this spell, tap an untapped artifact you control.
Target player discards two cards.

{T}: Add {C}.
Satrapies you control have “{1}, {T}: Add one mana of any color.”

{U/B}{U/B}: Return Nherix, the Soulcage from your graveyard to the battlefield tapped.
{6}: Return target creature card with mana value 2 or less from your graveyard to the battlefield tapped.

When Night Howlers enters, target opponent reveals three cards from their hand and you choose one of them. Exile that card until Night Howlers leaves the battlefield.

When Night Shepherd enters, return a creature you control to its owner's hand.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Each player discards a card or sacrifices a creature.
III — Each opponent loses life equal to the number of creature cards in their graveyard. You gain life equal to the number of creature cards in your graveyard.

Put target nonland permanent on top of its owner's library.
Draw a card.

Flying (This creature can't be blocked except by creatures with flying or reach.)
As long as Nightclad Stalker is enchanted, it gets +1/+0 and has deathtouch and lifelink.

Sacrifice a creature: Look at the top card of target player's library. You may have that player put that card into their graveyard.

Flying, lifelink
Whenever Nightfall Sphinx or another creature you control enters, each opponent loses 1 life and you gain 1 life.

Destroy target creature. Recruit. (Create a 0/0 white Soldier Army creature token, then put a +1/+1 counter on each Army you control.)

At the beginning of your upkeep, if Nightmare Riders is in your graveyard, you may mill two cards.

{1}, Discard a card: Create a Gold token. (It's an artifact with “Sacrifice this artifact: Add one mana of any color.”)
{T}, Sacrifice an artifact: Draw a card.

Other Rogues you control have menace.
{2}{U}: Target blocking creature gets -1/-0 until end of turn.

Reach, deathtouch
When Nightshade Ambusher enters, you may pay {1}{G}. When you do, destroy target creature with flying.

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
{1}{G}: Nightshade Slayer gets +2/+2 until end of turn. Activate only once each turn.

Flying
{3}{U}, Sacrifice Nimbus Fae: Put target creature on top of its owner's library.

When Nitrous Renewer enters, you may put a land card from your hand onto the battlefield tapped.
{3}{G}, Exile Nitrous Renewer from your graveyard: Return target land card from your graveyard to your hand. Activate only as a sorcery.

Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)
Whenever you cast an instant or sorcery spell, Noirohpo Renegade gets +1/+0 until end of turn.

Trample
Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
When Nonpareil of the Abyss enters, create an Idol token.
Nonpareil of the Abyss has ward {8} as long as you're in a renaissance.

Flying

Flash
When Notorious Smuggler enters, target opponent reveals their hand. Choose a nonland card revealed this way. Copy it. You may cast the copy this turn. (You still pay its costs, including color. Copies of permanents enter as tokens.)

Flying
Whenever Notorious Windraider attacks, other attacking Pirates and Rogues you control gain flying until end of turn.

When Noxan Zealot enters, create a tapped 5/5 black Demon enchantment creature token.
{T}, Pay 3 life: Target enchantment creature gains menace and deathtouch until end of turn. Activate only as a sorcery.

Noxious Garden enters tapped.
As Noxious Garden enters, choose a color other than black.
{T}: Add {B} or one mana of the chosen color.